I Have Excessive Sweating On My Lower Back And Entire

I have excessive sweating on my lower back and entire legs. I can watch the beads form while sitting in a chair. I do not sweat under my arms or face. I have hypothyroidism. This is embaressing because I leave wet chairs when I get up. Once in the past before this perfuse sweating started I was playing rachet ball and I looked like a red line was drawn down my body. One side flushed, the other side normal.